Fatal error: Uncaught Error: Interface "Sabberworm\CSS\Property\AtRule" not found in /home/slsiluser/public_html/service-portal-mobile-responsive/vendor/sabberworm/php-css-parser/src/Property/Import.php:12
Stack trace:
#0 {main}
thrown in /home/slsiluser/public_html/service-portal-mobile-responsive/vendor/sabberworm/php-css-parser/src/Property/Import.php on line 12